WO2021215571A1 - Battery module monitoring device and battery module for electric vehicle having same - Google Patents
Battery module monitoring device and battery module for electric vehicle having same Download PDFInfo
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- WO2021215571A1 WO2021215571A1 PCT/KR2020/006340 KR2020006340W WO2021215571A1 WO 2021215571 A1 WO2021215571 A1 WO 2021215571A1 KR 2020006340 W KR2020006340 W KR 2020006340W WO 2021215571 A1 WO2021215571 A1 WO 2021215571A1
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- secondary battery
- cell
- fpcb
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- battery module
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/90—Vehicles comprising electric prime movers
- B60Y2200/91—Electric vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a battery for an electric vehicle, and more particularly, to a monitoring device having a configuration suitable for checking the voltage and temperature of cells together in a module in a battery pack for an electric vehicle, and a battery module employing the same.
- a battery is basically a device made to make chemical energy compatible with electrical energy, and the use of a secondary battery capable of charging and discharging together is a basic premise due to the characteristics of a vehicle.
- the chemical reaction that takes place inside the battery is affected by environmental conditions like general chemical reactions, and in particular, it is greatly affected by temperature. For example, in a high temperature range where self-stability is lowered due to an abnormal reaction and self-damage may occur, the battery itself may be damaged and a vehicle fire may occur.
- the generation of heat during charging or discharging in a battery is due to structural changes in the chemical substances constituting elements such as the negative electrode, positive electrode, and electrolyte of the battery itself, but it is largely due to the thermal action that occurs while current flows, such as Joule heat.
- a battery cell is made of the same structure and material, and if the size of a simple battery cell is increased, the volume and capacity increase at the same rate, and the generation of heat in the battery cell is proportional to the volume or mass. This is proportional to the cube of the external size.
- the generated heat is emitted through the surface of the battery cell, and the amount of heat emitted is proportional to the surface area, temperature difference, and time, and the surface area is proportional to the square of the size.
- a means and method for forcible cooling of the battery are devised, and water-cooled cooling by cooling water circulation similar to that of an internal combustion engine engine, and air-cooling cooling means by wind may be adopted.
- a circuit method for blocking or limiting the supply or inflow of electrical energy from the battery may be used.
- the electrode terminals of a plurality of battery cells are coupled in series and in parallel for large-capacity and high voltage, and various sensors or controls installed around the cells check the voltage at the electrode terminals of the cells.
- Cells and peripherals are often connected in various ways, such as the BMS of the battery pack, in order to control the device and regulate the state of the battery.
- the minimum unit module that monitors the voltage and temperature of each cell in the battery pack includes a cover that protects and fixes the cell, a terminal (terminal) for electrical connection, and a stud bolt that fixes it. It is assembled inside an enclosure or housing of a predetermined volume to provide protection against the external environment with the back and the like.
- a lithium-ion battery module has a structure in which a plurality of cells are stacked, and in order to check whether the voltage and temperature of each cell are in a normal state, means such as a cell voltage monitoring terminal and a sensor for temperature monitoring and related wiring are usually required. It is installed outside the battery module.
- the lithium-ion battery module monitoring terminal is mounted on the side of the battery module and includes a part in contact with the terminal (terminal) of the cell, and a monitoring board connected by a crimped bar terminal and stud bolt and FPCB connector to maintain a solid assembly of the contact part. is composed by
- the cable for measuring cell voltage and temperature consists of, for example, 20 or more signal lines, it occupies a large space, and the design freedom for the wiring route is low, risk exists.
- the present invention is intended to solve the above-mentioned problems, and it is possible to eliminate the cable method that occupies a lot of installation space in the past, to freely design the wiring direction for cell voltage monitoring, and to reduce the size of the circuit module.
- An object of the present invention is to provide a cell voltage and temperature monitoring device for a lithium ion battery module having a configuration and a battery module for an electric vehicle having the same.
- the monitoring device for an electric vehicle battery module of the present invention has a property that can be deformed well by itself, so that a cell voltage monitoring terminal and a temperature monitoring terminal are integrated in a FPCB that is easy to three-dimensional wiring by bending or bending. It is integrally configured to include, and it is characterized in that this FPCB is connected to each battery cell of the battery module and used as a part of the lead wire for connection with the BMS.
- the positioning and arrangement of the cell voltage monitoring terminal and the temperature monitoring terminal in one FPCB is made according to the method of arranging the cells in the module and determining the position of the electrode terminal and the position of the cell temperature measurement in the cell, and a significant part can be in the form of a periodic arrangement.
- the monitoring device for an electric vehicle battery module of the present invention is not limited to
- a circuit unit including a plurality of secondary battery cells physically overlapping each other, a mechanism (frame) for fixing the secondary battery cells, and a wiring for electrically coupling the cells to each other and drawing power and a wiring for distributing an electrical signal
- a monitoring device for a battery module for checking the voltage and temperature of a cell in a battery module for an electric vehicle comprising:
- a temperature sensor that forms a part of the circuit part and is in close contact with the cell so as to be electrically insulated from the cell and thermally transferred and generates an electrical signal according to the cell temperature, and a terminal for measuring a voltage connected to the terminal of the cell to check the cell voltage. It is characterized in that it comprises a flexible printed circuit board (FPCB) provided with a terminal for measuring the temperature.
- FPCB flexible printed circuit board
- a thermistor may be used as the temperature sensor.
- the battery module for an electric vehicle of the present invention for achieving the above object,
- a plurality of secondary battery cells physically overlapping each other, a mechanism for fixing the secondary battery cells, and a circuit unit including a wiring for electrically coupling the cells to each other and extracting power and a wiring for distributing an electrical signal;
- an electrical terminal for measuring voltage connected to an electrode terminal of the cell is in close contact with the cell so as to be electrically insulated from and thermally transferred to the cell according to the cell temperature.
- a flexible printed circuit board (FPCB) provided with a temperature sensor for changing an electrical signal.
- each battery cell is made of a prismatic or pouch-type secondary battery, and the large-area surface is overlapped with the heat conductor plate as a medium while the periphery is fixed with a frame to form a pair. arranged, and using the frame to form a fixed state with each other,
- a stud is installed on one side of the frame corresponding to the side where the electrode terminal of the battery cell is formed for at least one pair, the electrode terminals of the pair of cells are both arranged around the stud, and a stud hole is installed in the stud counterpart of the FPCB and an electrical terminal for measuring voltage is disposed around the stud hole through which the stud passes,
- the frame is formed such that a portion corresponding to the thermistor is removed to expose a portion of the side where the electrode terminal of the battery cell is formed,
- the exposed side part of the cell is in contact with the thermistor of the FPCB, and the electrical terminal for measuring the voltage of the FPCB is the electrode terminal of a paired cell It can be made to be electrically connected while overlapping the two.
- the present invention it is possible to replace the cable, which occupies a large amount of installation space in the existing battery module, with a wire pattern in the FPCB, and include a terminal for monitoring cell voltage and a temperature sensor such as a thermistor for monitoring the cell temperature in the FPCB. Therefore, wiring in the module can be made simple and clear.
- an FPCB capable of reducing volume and weight compared to cables is used for wiring in a battery module, and since the relatively bending and bending properties of the FPCB itself can be used, the wiring direction within the module can be freely designed. and the size of the module can be miniaturized.
- the present invention can simplify, miniaturize, and lighten a related device and a battery module having the same in monitoring cell voltage and temperature of a lithium ion battery module, and reduce the possibility of defects due to chaos due to wiring and interference between wirings. have.
- 1 is a plan view showing the shape of a terminal for measuring voltage in an embodiment of the present invention
- FIG. 2 is a plan view showing a thermistor element for temperature measurement and a wiring terminal connected to the element in an embodiment of the present invention
- FIG. 3 is a plan view and a bottom view showing an embodiment of a cell voltage and temperature monitoring device of a battery module for an electric vehicle;
- FIG. 4 is a plan view and a bottom view showing another embodiment of a cell voltage and temperature monitoring device of a battery module for an electric vehicle;
- FIG. 5 is a partially exploded perspective view showing the combination of the device and the battery module according to an embodiment of the present invention
- Figure 6 is a partially exploded perspective view showing a device of another embodiment of the present invention is combined form of the battery module
- FIG. 7 is a perspective view illustrating a combination of the device of the present invention and a Remote Lithium-ion Energy Controller (R-LEC) in a battery sub-pack in which two battery modules of the present invention are combined;
- R-LEC Remote Lithium-ion Energy Controller
- FIG. 8 is a perspective view showing two embodiments of the device of the present invention limitedly shown in FIG. 7, in which the connectors of the two embodiments are combined into one connector in a double row.
- FIG. 3 is a plan view (front) and a bottom view (rear) schematically showing the configuration of a cell voltage and temperature monitoring device according to an embodiment (type A) of the present invention
- FIG. 4 is a different form from FIG. It is a plan view (front) and a bottom view (rear) schematically showing the configuration of an FPCB cell voltage and temperature monitoring device according to another embodiment (type B) of the invention
- FIG. 5 and 6 are exploded perspective views each illustrating a form in which a cell voltage and temperature monitoring device according to an embodiment and another embodiment of the present invention is connected to each cell part in the lithium ion battery module.
- the device of the present invention includes FPCBs 503 and 603 having terminals and wires drawn out from the terminals, and a connection part ( Female connector assembly portion: 303, 403) is made with a female connector (504, 604) coupled to the position.
- the FPCB has a terminal forming part in which terminals are largely formed and wires are drawn out from the terminals, and a connection part extending only by gathering wires, and the end of the connection part (female connector assembly part) is equipped with a female connector for connection with the outside of the device. do.
- a plurality of FPCB terminals for example, terminals 101, 301, 401 for voltage measurement as shown in FIG. 1, are formed at predetermined intervals along the length direction of the FPCB, as shown in FIG.
- the FPCB terminals to which the thermistor elements 201, 302, and 402 for measuring the cell temperature are installed are also arranged in the longitudinal direction.
- the conductive pattern forming the conducting wire in the FPCB is drawn out in the vertical direction, gathered together to form a parallel line, and extends in the horizontal longitudinal direction.
- the connecting portion has a horizontal portion extending in the longitudinal direction from the terminal forming portion and vertical portions 304 and 404 extending by being bent in the vertical direction, and a female connector is installed at the end of the vertical portion.
- the female connectors 504 and 604 are connectors having a signal transmission function having a plurality of pins.
- the wiring is connected only to the voltage measurement terminals 101, 301, and 40 above the horizontal line passing through the middle of the terminal forming part, and in FIG. 4, the wiring is connected only to the voltage measuring terminal under the horizontal line passing through the middle of the terminal forming part. It can be seen that they are connected, and this is because a sufficient number of terminals for voltage measurement are installed in suitable positions in advance, and wiring is designed as needed so that FPCBs can be made and used. .
- a terminal for voltage measurement is installed around the hole where the stud hole 102 is coupled, and there are two types of terminals in a form connected to the wiring in a state insulated from the periphery and a terminal in a common state not completely insulated from the periphery. It has a form that can be connected to an electrode terminal, and can be used by selecting a terminal according to the configuration situation.
- the thermistor element as shown in FIG. 2 may be made of an element that changes electromotive force according to temperature, and one wire is connected to one end of the element, and the other end is connected in common to the surroundings so that a potential difference can be detected between the wiring and the surroundings.
- This is an example, and a specific configuration may be made according to a known thermistor element.
- the thermistor element is coupled to the FPCB in the form of SMD to constitute the device of the present invention. can be
- this FPCB Flexible Printed Circuit Board
- it is bent in the longitudinal direction so that the longitudinal direction of the terminal forming part is the X-axis, the horizontal part of the connection part is the Y-axis, and the vertical part of the connection part is the Z-axis. It is possible, and it is possible to reduce the size and weight of the device compared to the cable leads, and it is possible to provide high durability and high-density wiring while giving repeated bending, and it is possible to configure a highly reliable circuit without wiring errors and good assembly.
- the cable for the terminal for voltage measurement and the signal cable for the thermistor element for temperature measurement are separately configured to complicate the cable connection. entanglement can be prevented.
- the female connectors for signal transmission (303, 403) having a plurality of pins formed at the end of the FPCB are assembled in a vertical direction along the length direction, and the width specification of the female connectors (303,403) is at a level that secures the FPCB wiring path. That is, it can be made to a level somewhat larger than the width of the FPCB (refer to reference numerals 304 and 404).
- As an FPCB a single-sided FPCB with terminals and patterns limited to one side or a double-sided FPCB installed together on both sides can be used as needed.
- the voltage measurement terminals 101 provided on the surfaces of the FPCBs 503 and 603 are the electrode terminals of the cell. That is, the cell terminals 505 and 605 are closely connected to each other.
- the cell voltage and temperature monitoring device can be installed on only one side of a module or can be installed on both sides of the module opposite to each other.
- the arrangement of the stud holes 102 of the FPCB to which the stud bolts 502 and 602 in the frame of the cell assembly are assembled is different, so that the A-type FPCB and the B-type FPCB By not matching with each other, it is possible to suppress or prevent problems caused by erroneous insertion of the FPCB.
- a method of preventing erroneous insertion by varying the sizes of two or more FPCBs can be generally used.
- the direct contact state between the thermistor element 201 and the cell terminals 505 and 605 for temperature measurement may cause failure and ignition of the thermistor element 201, it has a predetermined interval, and a silicon filler is applied to prevent a short circuit. It is desirable to prevent and ensure reliable transfer of cell temperature.
- FIG. 7 shows two lithium-ion battery modules according to the present invention are combined to form a battery sub-pack, and at this time, a cell voltage and temperature monitoring device in the module is connected to the R-LEC (Remote Lithium-ion Energy) (R-LEC) upper part of the sub-pack through a connector for connection. It is a perspective view showing the form connected to the controller).
- R-LEC Remote Lithium-ion Energy
- the module can be housed in a separate enclosure or case, or it can be combined with a panel or bracket to protect the surrounding side. It can be seen that the R-LEC that can be combined with the female connector of the module is located above the upper cover that covers the upper part of the module, which can be an intermediate part for connection with the BMS. The R-LECs of the two modules can be wire-connected to each other in any way required.
- the upper cover has a slit or hole through which the FPCB end of each module and the female connector can pass.
- FIG. 8 shows two monitoring devices combined with one module in FIG. 7 and an arrangement form for combining them with R-LEC.
- two FPCB-type monitoring devices connected in one battery module are respectively bent and placed in contact with the module in three dimensions, then overlapped in the vertical part of the connection part, and the female connector is located at the end part
- It shows an exemplary form that is arranged to form a double layer and combined with an R-LEC having a male connector type connection in this state.
- the female connector for signal transmission having a plurality of pins is assembled in double rows, and the size of the female connector for signal transmission in each row is determined at a level that secures the wiring path of the FPCB.
- a secondary battery cell using lithium is mainly used to increase the capacity to volume or weight ratio.
- the cell assembly is installed with the wide sides of the cell facing each other and overlapping each other.
- a heat conductor heat sink such as an aluminum plate is installed between the cell and the cell forming a pair so that it can be used for heating or cooling the cell.
- a plurality of cells and a heat conductor are fixed in a state of overlapping, for example, in the left and right directions with screws passing through a plurality of frames. It is installed in the front and rear direction of the frame and is exposed to the space between the frames.
- the stud bolts 602 are formed on the frame, and electrode terminals of the same polarity of the cells forming a pair are bent so as to overlap each other on the frame avoiding the stud bolts and exposed to the outside.
- a first aluminum plate with a hole formed at the stud bolt 602 position is stacked on the cell terminal or electrode terminal, and an FPCB device in which an electrical terminal for voltage measurement and a thermistor, which is a sensor for temperature measurement, is installed is stacked on top of the stud bolt again
- a second plate or a compression tab 606 having a hole formed therein is stacked.
- the nut 607 is coupled to the stud bolt and the nut is tightened to bring the frame having the stud bolt, the first aluminum plate, the FPCB, and the second plate into close contact.
- the voltage measurement terminal is formed around the hole and is electrically connected to one cell terminal (electrode terminal) of the pouch cell around the stud bolt 602, and the temperature measurement sensor (thermistor element: 201) of the FPCB is exposed. It is in close contact with some surfaces of the cell. That is, the thermistor does not touch the first aluminum plate, but comes into contact with a part of the cell surface exposed through the removed portion of the frame. However, a part of the cell surface is electrically non-conductive and an adhesive material layer or adhesive layer tape with excellent thermal conductivity is applied to stably combine with a part of the exposed cell surface so that the thermistor recognizes the cell temperature.
- the thermistor mainly uses the resistance change according to the temperature of the semiconductor, and according to the temperature, the electric signal that changes in the electric conductor in the FPCB connected to the thermistor is transmitted, so that the temperature change can be confirmed.
- a wiring connected to the thermistor that is, an electrical conductor connected to an electrical conductor and a terminal for voltage measurement, is connected to a female connector formed at one end of the FPCB to draw an electrical signal to the outside.
- the female connector is connected to the BMS of the battery pack through the R-LEC of the module circuit installed outside the cover or housing of the battery module, and can transmit sensing information necessary for the BMS and receive a control signal from the BMS.
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Abstract
Disclosed is a battery module monitoring device for an electric vehicle that is integrally configured to integrally include a cell voltage monitoring terminal and a temperature monitoring terminal in an FPCB which can easily transform itself and is easy to use in three-dimensional wiring by bending or curving, wherein such an FPCB is connected to each battery cell of a battery module and used as a part of a lead wire for connection with a BMS. According to the present invention, by replacing a cable that took up a lot of space in an existing battery module with a wire pattern in the FPCB, a cell voltage monitoring terminal and a temperature sensor for cell temperature monitoring can be included in the FPCB to be manufactured integrally, and thus, the wiring in the module can be improved.
Description
본 발명은 전기자동차용 배터리에 관한 것으로 보다 상세하게는 전기자동차용 배터리 팩 내의 모듈에서 셀의 전압 및 온도를 함께 확인하기에 적합한 구성을 가지는 모니터링 장치 및 이를 채용한 배터리 모듈에 관한 것이다.The present invention relates to a battery for an electric vehicle, and more particularly, to a monitoring device having a configuration suitable for checking the voltage and temperature of cells together in a module in a battery pack for an electric vehicle, and a battery module employing the same.
자동차 배기가스에 대한 국제 환경규제 강화, 석유의 고갈 가능성, 고유가 지속 등으로 세계 자동차시장은 내연기관 자동차에서 전기자동차로 눈을 돌리고 있다. 특히 순수 전기자동차(EV)는 효과적인 온실가스 감축수단이자, 지속가능한 환경을 위한 유력한 대안으로 부상하고 있다. 한편, 연료비 상승에 대한 부담으로 저가 연료 자동차에 대한 소비자들의 선호가 높아짐에 따라 전기 자동차(EV) 및 하이브리드자동차(HEV)등에 대한 판매가 대폭 증가하고 있다. 이에 따라 선진국들은 전기 자동차 보급 정책을 강력하게 추진하고 있다.Due to the strengthening of international environmental regulations on automobile exhaust gas, the possibility of depletion of oil, and the continued high oil price, the global automobile market is turning from internal combustion engine vehicles to electric vehicles. In particular, pure electric vehicles (EVs) are emerging as an effective means of reducing greenhouse gas emissions and as a viable alternative for a sustainable environment. Meanwhile, sales of electric vehicles (EVs) and hybrid vehicles (HEVs) are increasing significantly as consumers' preference for low-cost fuel vehicles increases due to the burden of rising fuel costs. As a result, advanced countries are strongly promoting electric vehicle supply policies.
따라서 전기자동차를 운영하기 위한 핵심 부품인 배터리의 용량과 효율은 전기자동차의 가장 중요한 관건이 되고, 성능에 따른 주행 가능 거리가 큰 이슈가 되고 있으며, 이로 인해 자동차 제조 회사 및 소비자의 배터리에 대한 관심이 높아지고 있다. Therefore, the capacity and efficiency of the battery, which are key components for operating an electric vehicle, are the most important factors for an electric vehicle, and the drivable distance according to the performance is a big issue. this is rising
종래 차량 전장용 배터리는 주로 납축전지가 사용되었지만 차량의 동력원으로 사용하기에 납축전지는 무게 및 부피 대비 축적 가능한 전기량, 즉 충전용량이 낮아 전기자동차용 배터리로는 무게 대비 충전용량을 높일 수 있는 리튬 계열의 배터리가 주로 사용되고 있다. Conventional vehicle electric vehicle batteries mainly used lead-acid batteries, but since lead-acid batteries are used as power sources for vehicles, the amount of electricity that can be accumulated compared to weight and volume, i.e., charge capacity, is low, so lithium, which can increase the charge capacity compared to weight, is a lithium battery for electric vehicles. This series of batteries is mainly used.
배터리는 기본적으로 화학적 에너지를 전기 에너지와 호환시킬 수 있도록 이루어진 장치이며, 차량의 특성상 충전과 방전이 함께 이루어질 수 있는 이차전지의 사용이 기본적인 전제가 되고 있다. A battery is basically a device made to make chemical energy compatible with electrical energy, and the use of a secondary battery capable of charging and discharging together is a basic premise due to the characteristics of a vehicle.
그런데, 배터리 내부에서 이루어지는 화학 반응은 일반적 화학 반응과 같이 주변 환경 조건의 영향을 받으며, 특히 온도의 영향을 많이 받게 된다. 가령, 이상 반응으로 자체 안정성이 떨어지고 자체 손상이 발생할 수 있는 높은 온도 대역에서는 배터리 자체 손상이 발생하고 차량 화재 등이 유발될 수 있다.However, the chemical reaction that takes place inside the battery is affected by environmental conditions like general chemical reactions, and in particular, it is greatly affected by temperature. For example, in a high temperature range where self-stability is lowered due to an abnormal reaction and self-damage may occur, the battery itself may be damaged and a vehicle fire may occur.
한편, 배터리에서 충전시나 방전시 열이 발생하는 것은 배터리 자체의 음극, 양극, 전해액과 같은 요소를 이루는 화학물질에서의 구조 변화에 기인하는 것도 있지만 주울열과 같이 전류가 흐르면서 이루어지는 열작용에 의한 바가 크다. On the other hand, the generation of heat during charging or discharging in a battery is due to structural changes in the chemical substances constituting elements such as the negative electrode, positive electrode, and electrolyte of the battery itself, but it is largely due to the thermal action that occurs while current flows, such as Joule heat.
간단히 생각할 때 배터리 셀을 같은 구조, 재료로 이루어진다고 보고, 단순배터리 셀의 크기를 증가시키면 부피와 잘량은 같은 비율로 증가하고, 배터리 셀에서의 열의 발생은 부피나 질량에 비례한다고 볼 수 있으며, 이는 외형적 크기의 세제곱에 비례하는 양상을 보인다. In simple terms, it can be seen that a battery cell is made of the same structure and material, and if the size of a simple battery cell is increased, the volume and capacity increase at the same rate, and the generation of heat in the battery cell is proportional to the volume or mass. This is proportional to the cube of the external size.
한편, 발생된 열의 방출은 배터리 셀의 표면을 통해 이루어지며, 열 방출량은 표면적과 온도차 및 시간에 비례하고, 표면적은 크기의 제곱에 비례하는 양상을 보인다. On the other hand, the generated heat is emitted through the surface of the battery cell, and the amount of heat emitted is proportional to the surface area, temperature difference, and time, and the surface area is proportional to the square of the size.
따라서, 배터리가 커지고 용량이 커지면, 일반적 온도 수준에서는 배터리에서 발생하는 열이 방출되는 열에 비해 많아지고, 배터리 온도가 증가하게 되며, 일반적 온도 수준보다 더 높은 온도에서 열발생과 열방출의 균형이 이루어진다. Therefore, as the battery becomes larger and the capacity increases, the heat generated by the battery becomes larger than the heat emitted at the normal temperature level, the battery temperature increases, and the balance between heat generation and heat dissipation is achieved at a temperature higher than the general temperature level. .
일반적으로 대용량을 요구하는 차량용 배터리에서 만약 차량의 시간당 출력을 높이는 것에 대한 요구가 증가하고, 배터리 사이즈 및 충전 용량이 커지면, 배터리에서의 발열량과 방열량의 자연적인 균형점의 온도는 매우 높아져 배터리 자체의 내열 범위를 넘어서는 것이 될 수도 있다. 비록 배터리가 화재나 폭발을 일으키지 않는 경우라도, 배터리의 과열은 배터리 셀 내부의 화학물질의 열화, 변성, 가스 발생, 회로 장치의 열화 등의 현상을 일으키고 배터리 기능 전체의 저하 및 수명 저하를 가져올 수 있다. In a vehicle battery that generally requires a large capacity, if the demand for increasing the output per hour of the vehicle increases, and the battery size and charging capacity increase, the temperature at the natural balance point of the amount of heat generated in the battery and the amount of heat dissipation becomes very high, and the heat resistance of the battery itself increases. It may be out of bounds. Even if the battery does not cause a fire or explosion, overheating of the battery may cause deterioration of chemical substances inside the battery cell, denaturation, gas generation, deterioration of circuit devices, etc. have.
이런 대용량 배터리에서의 문제점을 해결하기 위해 배터리에 대한 강제적 냉각을 위한 수단, 방법이 강구되며, 내연기관 엔진과 비슷한 냉각수 순환에 의한 수냉식 냉각, 바람에 의한 공냉식 냉각 수단이 채택될 수 있다. 다른 한편으로 배터리의 온도가 지나치게 높은 경우, 배터리에서의 전기에너지 공급이나 유입을 차단하거나 제한하는 회로적 방법을 사용할 수도 있다. In order to solve the problem in such a large-capacity battery, a means and method for forcible cooling of the battery are devised, and water-cooled cooling by cooling water circulation similar to that of an internal combustion engine engine, and air-cooling cooling means by wind may be adopted. On the other hand, when the temperature of the battery is too high, a circuit method for blocking or limiting the supply or inflow of electrical energy from the battery may be used.
그런데 이러한 배터리의 냉각이나 충전이나 방전 전류의 제한을 위해서는 배터리의 상태, 정확히는 배터리를 이루는 개개의 셀의 온도 상태를 정확하게 측정할 필요가 있고, 이를 위해 배터리 모듈에서는 개개의 배터리 셀의 온도를 측정하기 위한 온도 센서가 구비되는 경우가 많다. However, in order to cool the battery or limit the charging or discharging current, it is necessary to accurately measure the state of the battery, precisely the temperature state of each cell constituting the battery. In many cases, a temperature sensor is provided for
그런데, 일반적으로 전기자동차용 배터리 팩에서 대용량, 고전압을 위해 다수의 배터리 셀의 전극 단자는 직렬 및 병렬로 결합되어 있고, 셀의 전극 단자에서의 전압을 확인하고 셀 주변에 설치되는 각종 센서나 조절 장치를 조절하고 배터리 상태를 조절하기 위해 셀 및 주변 장치는 배터리 팩의 BMS 등과 다양한 방식으로 연결되는 경우가 많다. However, in general, in a battery pack for an electric vehicle, the electrode terminals of a plurality of battery cells are coupled in series and in parallel for large-capacity and high voltage, and various sensors or controls installed around the cells check the voltage at the electrode terminals of the cells. Cells and peripherals are often connected in various ways, such as the BMS of the battery pack, in order to control the device and regulate the state of the battery.
따라서, 배터리 모듈이나 배터리 팩에는 단순히 배터리 전극 단자의 결선용 도선 뿐 아니라 다양한 요소의 설치와 신호 접속을 위한 액세서리 요소의 설치가 많아질 수 있으며, 배터리 팩을 이루는 인클로져와 같은 한정된 공간 내에 가능하면 콤팩트하고 경량이 되도록 설치되어야 하며, 이들 요소와 도선이 복잡하게 서로 얽히면 이들 요소의 상호간의 간섭에 의해 고장 및 불량의 문제가 생기기 쉽고, 배터리의 제조와 유지 수선과 같은 보수 작업, 교체 작업을 어렵게 하는 요인이 될 수 있다. Therefore, in the battery module or battery pack, not only the wiring for the battery electrode terminal but also the installation of various elements and the installation of accessory elements for signal connection can be increased, and compact if possible within a limited space such as the enclosure constituting the battery pack. It should be installed in such a way that it is lightweight and complex, and if these elements and conductors are complicatedly entangled with each other, it is easy to cause problems of failure and defects due to the mutual interference of these elements, and repair work such as battery manufacturing, maintenance and repair, and replacement work are difficult. could be a factor
보다 구체적인 예시로서, 배터리 팩에서 각 셀의 전압과 온도 상태를 모니터링하는 대상이 되는 최소단위의 모듈은 셀을 보호하고 고정하는 커버와 전기적인 결선을 위한 터미널(단자), 그리고 이를 고정하는 스터드 볼트 등을 함께 구비한 상태로, 외부 환경에 대한 보호를 제공하기 위한 소정 체적의 인클로져 혹은 하우징 내부에 조립된다.As a more specific example, the minimum unit module that monitors the voltage and temperature of each cell in the battery pack includes a cover that protects and fixes the cell, a terminal (terminal) for electrical connection, and a stud bolt that fixes it. It is assembled inside an enclosure or housing of a predetermined volume to provide protection against the external environment with the back and the like.
리튬 이온 배터리 모듈은 다수의 셀이 적층된 구조이며, 각 셀의 전압과 온도가 정상 상태에 있는지를 확인하기 위하여, 통상적으로 셀전압 모니터링 단자 및 온도 모니터링을 위한 센서 등의 수단과 이와 관련된 배선이 배터리 모듈 외부에 설치된다. A lithium-ion battery module has a structure in which a plurality of cells are stacked, and in order to check whether the voltage and temperature of each cell are in a normal state, means such as a cell voltage monitoring terminal and a sensor for temperature monitoring and related wiring are usually required. It is installed outside the battery module.
리튬 이온 배터리 모듈 모니터링 단자는 배터리 모듈 측면에 장착되어 셀의 터미널(단자)과 접촉하는 부분과, 접촉부의 견고한 조립 상태 유지를 위한 압착 바터미널과 스터드 볼트 그리고 FPCB 커넥터에 의하여 연결되는 모니터링 보드를 포함하여 구성된다.The lithium-ion battery module monitoring terminal is mounted on the side of the battery module and includes a part in contact with the terminal (terminal) of the cell, and a monitoring board connected by a crimped bar terminal and stud bolt and FPCB connector to maintain a solid assembly of the contact part. is composed by
그러나, 종래의 모니터링 단자들에 있어서, 셀전압 모니터링 단자에서 외부로 연장되는 모니터링 케이블과 온도 모니터링을 위한 센서에서 나오는 신호 케이블의 설치 공간이 많이 필요하고, 또한 케이블을 외부로 빼내는 배선 경로가 매우 복잡해지는 문제점이 있다.However, in the conventional monitoring terminals, a large amount of installation space is required for the monitoring cable extending from the cell voltage monitoring terminal to the outside and the signal cable coming out of the sensor for temperature monitoring, and the wiring route for taking out the cable to the outside is very complicated. There is a problem with cancellation.
다시 말하자면 셀전압과 온도를 측정하기 위한 케이블은 가령 20개 이상의 신호선으로 구성되기 때문에 차지하는 공간이 크고, 또한 배선 경로에 대한 설계 자유도가 떨어져 배터리 모듈 외부에 케이블이 뒤엉킨 상태로 복잡하게 설치되어 단선 등의 위험이 존재하게 된다.In other words, since the cable for measuring cell voltage and temperature consists of, for example, 20 or more signal lines, it occupies a large space, and the design freedom for the wiring route is low, risk exists.
또한, 배터리 모듈 외부에 고정되는 케이블의 정렬 상태가 불안정하여, 결선 상태가 양호하지 못한 단점이 있다.In addition, the alignment state of the cables fixed to the outside of the battery module is unstable, there is a disadvantage that the connection state is not good.
본 발명은 상술한 바와 같은 문제점을 해결하기 위한 것으로서, 기존에 설치공간을 많이 차지하던 케이블 방식을 배제하고, 셀전압 모니터링을 위한 배선 방향을 자유롭게 설계할 수 있고, 회로 모듈의 사이즈를 소형화 할 수 있는 구성을 가지는 리튬 이온 배터리 모듈의 셀전압 및 온도 모니터링 장치 및 이를 구비하는 전기자동차용 배터리 모듈을 제공하는 것을 목적으로 한다. The present invention is intended to solve the above-mentioned problems, and it is possible to eliminate the cable method that occupies a lot of installation space in the past, to freely design the wiring direction for cell voltage monitoring, and to reduce the size of the circuit module. An object of the present invention is to provide a cell voltage and temperature monitoring device for a lithium ion battery module having a configuration and a battery module for an electric vehicle having the same.
상기 목적을 달성하기 위한 본 발명의 전기자동차 배터리 모둘용 모니터링 장치는 자체적으로 잘 변형될 수 있는 특성을 가져 굽히거나 휨에 의해 3차원 배선이 용이한 FPCB 내에 셀 전압 모니터링 단자 및 온도 모니터링 단자를 한꺼번에 포함하도록 일체적으로 구성하고, 이러한 FPCB를 배터리 모듈의 각 배터리 셀과 연결하여 BMS와의 연결을 위한 도선의 일부로서 사용하는 것을 특징으로 한다. In order to achieve the above object, the monitoring device for an electric vehicle battery module of the present invention has a property that can be deformed well by itself, so that a cell voltage monitoring terminal and a temperature monitoring terminal are integrated in a FPCB that is easy to three-dimensional wiring by bending or bending. It is integrally configured to include, and it is characterized in that this FPCB is connected to each battery cell of the battery module and used as a part of the lead wire for connection with the BMS.
이때, 하나의 FPCB 내에 셀 전압 모니터링 단자와 온도 모니터링 단자 위치를 정하고 배열시키는 것은 모듈 내에서 셀을 배열하고 셀 내에서 전극 단자의 위치 및 셀 온도 측정의 위치를 정하는 방식에 따라 이루어지며, 상당 부분에서 주기적 배열의 형태를 이룰 수 있다.At this time, the positioning and arrangement of the cell voltage monitoring terminal and the temperature monitoring terminal in one FPCB is made according to the method of arranging the cells in the module and determining the position of the electrode terminal and the position of the cell temperature measurement in the cell, and a significant part can be in the form of a periodic arrangement.
보다 구체적으로 본 발명의 전기자동차 배터리 모둘용 모니터링 장치는,More specifically, the monitoring device for an electric vehicle battery module of the present invention,
물리적으로 서로 겹쳐지는 복수의 이차전지 셀과, 이차전지 셀을 고정하는 기구물(프레임)과, 셀을 전기적으로 서로 결합시키고 전력을 인출하기 위한 배선 및 전기 신호를 유통하기 위한 배선을 포함하는 회로부를 구비하여 이루어지는 전기자동차용 배터리 모듈에서 셀의 전압 및 온도를 확인하기 위한 배터리 모듈용 모니터링 장치로서,A circuit unit including a plurality of secondary battery cells physically overlapping each other, a mechanism (frame) for fixing the secondary battery cells, and a wiring for electrically coupling the cells to each other and drawing power and a wiring for distributing an electrical signal A monitoring device for a battery module for checking the voltage and temperature of a cell in a battery module for an electric vehicle comprising:
상기 회로부의 일부를 이루면서, 셀 전압을 확인하기 위하여 셀의 단자와 연결되는 전압 측정용 단자와, 셀과 전기적으로 절연되고 열적으로 전열되도록 셀과 밀착되어 셀 온도에 따른 전기신호를 발생시키는 온도센서의 온도 측정용 단자가 함께 구비되는 연성인쇄회로기판(FPCB)을 포함하여 이루어지는 것을 특징으로 한다. A temperature sensor that forms a part of the circuit part and is in close contact with the cell so as to be electrically insulated from the cell and thermally transferred and generates an electrical signal according to the cell temperature, and a terminal for measuring a voltage connected to the terminal of the cell to check the cell voltage. It is characterized in that it comprises a flexible printed circuit board (FPCB) provided with a terminal for measuring the temperature.
이때, 온도센서로는 서미스터를 사용할 수 있다.In this case, a thermistor may be used as the temperature sensor.
상기 목적을 달성하기 위한 본 발명의 전기자동차용 배터리 모듈은,The battery module for an electric vehicle of the present invention for achieving the above object,
물리적으로 서로 겹쳐지는 복수의 이차전지 셀과, 이차전지 셀을 고정하는 기구물과, 셀을 전기적으로 서로 결합시키고 전력을 인출하기 위한 배선 및 전기 신호를 유통하기 위한 배선을 포함하는 회로부를 구비하여 이루어지는 전기자동차용 배터리 모듈로서,A plurality of secondary battery cells physically overlapping each other, a mechanism for fixing the secondary battery cells, and a circuit unit including a wiring for electrically coupling the cells to each other and extracting power and a wiring for distributing an electrical signal; As a battery module for an electric vehicle,
상기 회로부의 일부를 이루면서 개별 셀 전압을 확인하기 위한 모니터링 장치로서, 셀의 전극 단자와 연결되는 전압 측정용 전기단자와, 개별 셀과 전기적으로 절연되고 열적으로 전열되도록 셀과 밀착되어 셀 온도에 따른 전기신호를 변화시키는 온도센서가 함께 구비되는 연성인쇄회로기판(FPCB)을 포함하여 이루어지는 것을 특징으로 한다. As a monitoring device for checking the voltage of individual cells while forming a part of the circuit part, an electrical terminal for measuring voltage connected to an electrode terminal of the cell is in close contact with the cell so as to be electrically insulated from and thermally transferred to the cell according to the cell temperature. and a flexible printed circuit board (FPCB) provided with a temperature sensor for changing an electrical signal.
이때, 각각의 베터리 셀은 각형 혹은 파우치형 이차전지로 이루어지며, 주변이 프레임으로 고정된 상태로 대면적면이 열전도체 플레이트를 매개로 겹쳐져 쌍을 이루고, 복수의 쌍이 대면적면이 서로 겹치도록 배치되고, 상기 프레임을 이용하여 서로 고정된 상태를 이루며, At this time, each battery cell is made of a prismatic or pouch-type secondary battery, and the large-area surface is overlapped with the heat conductor plate as a medium while the periphery is fixed with a frame to form a pair. arranged, and using the frame to form a fixed state with each other,
적어도 한 쌍마다 베터리 셀의 전극 단자가 형성된 측면에 대응하는 프레임의 일 측에는 스터드가 설치되고, 한 쌍을 이루는 셀의 전극 단자들은 공히 스터드 주변에서 배치되고, FPCB의 스터드 대응부에는 스터드홀이 설치되고, 전압 측정용 전기 단자는 상기 스터드가 통과하는 상기 스터드홀 주변으로 배치되고,A stud is installed on one side of the frame corresponding to the side where the electrode terminal of the battery cell is formed for at least one pair, the electrode terminals of the pair of cells are both arranged around the stud, and a stud hole is installed in the stud counterpart of the FPCB and an electrical terminal for measuring voltage is disposed around the stud hole through which the stud passes,
프레임은 써미스터에 대응되는 일 부분이 제거되어 베터리 셀의 전극 단자가 형성된 측면의 일부를 노출하도록 형성되어, The frame is formed such that a portion corresponding to the thermistor is removed to expose a portion of the side where the electrode terminal of the battery cell is formed,
FPCB의 스터드홀로 스터드를 통과시키고 스터드를 고정수단으로 결속시킬 때(나사로 죌 때) 셀의 노출된 측면 일부는 FPCB의 서미스터와 접하고, FPCB의 전압 측정용 전기 단자는 한 쌍을 이루는 셀의 전극 단자들과 겹치면서 전기적으로 접속하도록 이루어질 수 있다. When the stud is passed through the stud hole of the FPCB and the stud is fastened with a fixing means (when screwed), the exposed side part of the cell is in contact with the thermistor of the FPCB, and the electrical terminal for measuring the voltage of the FPCB is the electrode terminal of a paired cell It can be made to be electrically connected while overlapping the two.
본 발명에 따르면 기존의 배터리 모듈 내의 설치공간을 많이 차지하던 케이블을 FPCB 내의 도선 패턴으로 대체하면서 FPCB 내에 셀전압 모니터링을 위한 단자와 셀 온도 모니터링을 위한 써미스터 등 온도 센서를 함께 포함시켜 일체형으로 제작할 수 있으므로 모듈 내의 배선을 간단하고 명확하게 할 수 있다.According to the present invention, it is possible to replace the cable, which occupies a large amount of installation space in the existing battery module, with a wire pattern in the FPCB, and include a terminal for monitoring cell voltage and a temperature sensor such as a thermistor for monitoring the cell temperature in the FPCB. Therefore, wiring in the module can be made simple and clear.
본 발명에 따르면 배터리 모듈 내의 배선에 케이블에 비해 부피와 무게를 줄일 수 있는 FPCB를 이용하며, FPCB 자체의 비교적 휨과 절곡이 가능한 속성을 이용할 수 있으므로, 모듈 내에서의 배선 방향을 자유롭게 설계할 수 있고 모듈의 사이즈를 소형화 할 수 있다.According to the present invention, an FPCB capable of reducing volume and weight compared to cables is used for wiring in a battery module, and since the relatively bending and bending properties of the FPCB itself can be used, the wiring direction within the module can be freely designed. and the size of the module can be miniaturized.
따라서 본 발명은 리튬 이온 배터리 모듈의 셀전압 및 온도 모니터링 함에 있어서 관련 장치 및 이를 구비한 배터리 모듈을 간단하고 소형, 경량화를 할 수 있으며, 배선에 의한 혼돈과 배선 간의 간섭으로 인한 불량 가능성을 줄일 수 있다.Therefore, the present invention can simplify, miniaturize, and lighten a related device and a battery module having the same in monitoring cell voltage and temperature of a lithium ion battery module, and reduce the possibility of defects due to chaos due to wiring and interference between wirings. have.
도1은 본 발명의 일 실시예에서의 전압 측정용 단자 형상을 나타내는 평면도,1 is a plan view showing the shape of a terminal for measuring voltage in an embodiment of the present invention;
도2는 본 발명의 일 실시예에서의 온도 측정용 써미스터 소자와 이 소자에 연결된 배선 단자를 나타내는 평면도,2 is a plan view showing a thermistor element for temperature measurement and a wiring terminal connected to the element in an embodiment of the present invention;
도3은 전기자동차용 배터리 모듈의 셀 전압 및 온도 모니터링 장치의 일 실시예를 나타내는 평면도 및 저면도,3 is a plan view and a bottom view showing an embodiment of a cell voltage and temperature monitoring device of a battery module for an electric vehicle;
도4는 전기자동차용 배터리 모듈의 셀 전압 및 온도 모니터링 장치의 다른 실시예를 나타내는 평면도 및 저면도,4 is a plan view and a bottom view showing another embodiment of a cell voltage and temperature monitoring device of a battery module for an electric vehicle;
도5는 본 발명의 일 실시예의 장치와 배터리 모듈의 결합 형태를 나타내는 일부 분해 사시도, 5 is a partially exploded perspective view showing the combination of the device and the battery module according to an embodiment of the present invention;
도6은 본 발명의 다른 실시예의 장치가 배터리 모듈의 결합 형태를 나타내는 일부 분해 사시도, Figure 6 is a partially exploded perspective view showing a device of another embodiment of the present invention is combined form of the battery module;
도7는 본 발명의 배터리 모듈이 2개 결합되어 이루어지는 배터리 서브 팩에서 본 발명 장치와 R-LEC(Remote Lithium-ion Energy Controler)의 결합 형태를 나타내는 사시도,7 is a perspective view illustrating a combination of the device of the present invention and a Remote Lithium-ion Energy Controller (R-LEC) in a battery sub-pack in which two battery modules of the present invention are combined;
도8은 도7에서 본 발명 장치의 두 실시예를 한정하여 나타내되, 두 실시예의 커넥터를 복열의 1개의 커넥터로 결합시킨 상태를 나타내는 사시도이다.FIG. 8 is a perspective view showing two embodiments of the device of the present invention limitedly shown in FIG. 7, in which the connectors of the two embodiments are combined into one connector in a double row.
이하 도면을 참조하면서 구체적 실시예를 통해 본 발명을 보다 상세히 설명하기로 한다.Hereinafter, the present invention will be described in more detail through specific examples with reference to the drawings.
도 3은 본 발명의 일 실시예(A타입)에 따른 셀전압 및 온도 모니터링 장치의 구성을 개략적으로 나타내는 평면도(앞면) 및 저면도(뒷면), 도4는 도3과 다른 형태의 것으로, 본 발명의 다른 실시예(B타입)에 따른 FPCB 셀전압 및 온도 모니터링 장치의 구성을 개략적으로 나타내는 평면도(앞면) 및 저면도(뒷면)이며, 3 is a plan view (front) and a bottom view (rear) schematically showing the configuration of a cell voltage and temperature monitoring device according to an embodiment (type A) of the present invention, and FIG. 4 is a different form from FIG. It is a plan view (front) and a bottom view (rear) schematically showing the configuration of an FPCB cell voltage and temperature monitoring device according to another embodiment (type B) of the invention,
도 5, 6는 각각 본 발명의 일 실시예 및 다른 실시예에 따른 셀전압 및 온도 모니터링 장치가 리튬 이온 배터리 모듈 내에서 각 셀 부분과 접속되는 형태를 나타내는 분해사시도이다.5 and 6 are exploded perspective views each illustrating a form in which a cell voltage and temperature monitoring device according to an embodiment and another embodiment of the present invention is connected to each cell part in the lithium ion battery module.
도 3 및 도4를 참조하면, 본 실시예들에서 본 발명의 장치는 단자들과 단자들에서 인출되는 배선들을 구비하는 FPCB(503, 603)와, 이 FPCB에서 그 배선들의 단부가 모이는 접속부(암커넥터 조립부: 303, 403) 위치에 결합되는 암커넥터(504, 604)를 구비하여 이루어진다. 3 and 4, in the present embodiments, the device of the present invention includes FPCBs 503 and 603 having terminals and wires drawn out from the terminals, and a connection part ( Female connector assembly portion: 303, 403) is made with a female connector (504, 604) coupled to the position.
FPCB는 크게 단자들이 형성되고 단자에서 배선이 인출되는 단자형성부와, 배선들만 모여서 연장되는 연결부를 구비하고, 그 연결부의 끝단(암커넥터 조립부)은 장치 외부와의 연결을 위한 암커넥터가 설치된다. The FPCB has a terminal forming part in which terminals are largely formed and wires are drawn out from the terminals, and a connection part extending only by gathering wires, and the end of the connection part (female connector assembly part) is equipped with a female connector for connection with the outside of the device. do.
단자들이 설치되고 배열되어 있는 단자형성부에서 다수의 FPCB 터미널, 가령 도1과 같은 전압 측정용 단자(101, 301, 401)는 FPCB 길이 방향을 따라 소정 간격으로 형성되고, 도2에 도시된 것과 같은 셀 온도 측정용 써미스터 소자(201, 302, 402)가 설치되는 FPCB 터미널도 길이 방향으로 배열되어 있다. 유효한 전압 측정용 단자(101)와 써미스터 소자(201)에서는 FPCB 내에서 도선을 이루는 도전 패턴이 수직 방향으로 인출되어 서로 모여 평행선을 이루면서 수평한 길이 방향으로 연장된다.In the terminal forming part where the terminals are installed and arranged, a plurality of FPCB terminals, for example, terminals 101, 301, 401 for voltage measurement as shown in FIG. 1, are formed at predetermined intervals along the length direction of the FPCB, as shown in FIG. The FPCB terminals to which the thermistor elements 201, 302, and 402 for measuring the cell temperature are installed are also arranged in the longitudinal direction. In the effective voltage measurement terminal 101 and the thermistor element 201, the conductive pattern forming the conducting wire in the FPCB is drawn out in the vertical direction, gathered together to form a parallel line, and extends in the horizontal longitudinal direction.
연결부는 단자형성부에서 길이 방향으로 연장되는 수평부분과, 수직방향으로 꺾여 연장되는 수직부분(304, 404)을 가지고, 수직부의 끝단에는 암커넥터가 설치됨을 볼 수 있다. 여기서 암커넥터(504, 604)는 복수 핀을 가진 신호 전달 기능을 가지는 커넥터이다.It can be seen that the connecting portion has a horizontal portion extending in the longitudinal direction from the terminal forming portion and vertical portions 304 and 404 extending by being bent in the vertical direction, and a female connector is installed at the end of the vertical portion. Here, the female connectors 504 and 604 are connectors having a signal transmission function having a plurality of pins.
단, 도3에서는 단자형성부의 중간을 지나는 수평선 위쪽의 전압 측정용 단자(101, 301, 40)에만 배선이 연결되고, 도4에서는 단자형성부의 중간을 지나는 수평선 아래쪽의 전압 측정용 단자에만 배선이 연결된 것을 볼 수 있으며, 이는 미리 전압 측정용 단자를 충분한 수로 적당한 위치에 설치하고, 필요에 따라 배선 디자인을 하여 FPCB를 만들어 사용할 수 있도록 한 것으로, 필요에 따라 배선을 바꾸어 사용할 수 있으므로 한정 조건은 아니다. However, in FIG. 3, the wiring is connected only to the voltage measurement terminals 101, 301, and 40 above the horizontal line passing through the middle of the terminal forming part, and in FIG. 4, the wiring is connected only to the voltage measuring terminal under the horizontal line passing through the middle of the terminal forming part. It can be seen that they are connected, and this is because a sufficient number of terminals for voltage measurement are installed in suitable positions in advance, and wiring is designed as needed so that FPCBs can be made and used. .
도1을 보면, 스터드 홀(102)이 결합되는 홀 주변으로 전압 측정용 단자가 설치되며, 주변과 절연된 상태로 배선과 연결된 형태와 주변과 완전히 절연되지 않은 공통 상태의 단자가 있어서 두 종류의 전극 단자와 연결이 가능한 형태를 띄고 있으며, 구성 상황에 맞게 단자를 선택하여 사용할 수 있다. 1, a terminal for voltage measurement is installed around the hole where the stud hole 102 is coupled, and there are two types of terminals in a form connected to the wiring in a state insulated from the periphery and a terminal in a common state not completely insulated from the periphery. It has a form that can be connected to an electrode terminal, and can be used by selecting a terminal according to the configuration situation.
도2와 같은 써미스터 소자는 온도에 따라 기전력을 달리하는 소자 등으로 이루어질 수 있으며, 소자의 일단에 하나의 배선이 연결되고, 다른 일단은 주변과 공통으로 연결되어 전위차가 배선과 주변 사이에서 검출될 수 있다. 이는 하나의 예시적이 것이며 구체적 구성은 기존에 알려진 써미스터 소자에 맞게 이루어질 수 있다. 써미스터 소자는 FPCB에 SMD 형태로 결합되어 본 발명 장치를 구성할 수 있고, 경우에 따라 FPCB 주변의 표면으로부터 돌출된 부분을 이루어 셀 온도 감지를 위해 셀 부분과 접촉할 때 특정 부분에 쉽게 밀착되도록 이용될 수 있다. The thermistor element as shown in FIG. 2 may be made of an element that changes electromotive force according to temperature, and one wire is connected to one end of the element, and the other end is connected in common to the surroundings so that a potential difference can be detected between the wiring and the surroundings. can This is an example, and a specific configuration may be made according to a known thermistor element. The thermistor element is coupled to the FPCB in the form of SMD to constitute the device of the present invention. can be
이런 FPCB(Flexible Printed Circuit Board)를 형성하면, 길이 방향으로 절곡하여 단자형성부의 길이 방향을 X축, 연결부의 수평 부분을 Y축, 연결부의 수직 부분을 Z축으로 생각하여 단독으로 3차원 배선이 가능하고, 케이블 도선에 비해 기기의 소형화 및 경량화가 가능하며, 또한 반복굴곡을 주면서 높은 내구성 및 고밀도 배선이 가능하며, 배선의 오류가 없고 조립이 양호하여 신뢰성이 높은 회로를 구성할 수 있다. When this FPCB (Flexible Printed Circuit Board) is formed, it is bent in the longitudinal direction so that the longitudinal direction of the terminal forming part is the X-axis, the horizontal part of the connection part is the Y-axis, and the vertical part of the connection part is the Z-axis. It is possible, and it is possible to reduce the size and weight of the device compared to the cable leads, and it is possible to provide high durability and high-density wiring while giving repeated bending, and it is possible to configure a highly reliable circuit without wiring errors and good assembly.
더욱이, 전압 측정용 단자와 온도 측정용의 써미스터 소자가 하나의 FPCB를 형성할 때 함께 형성되어 전압 측정용 단자를 위한 케이블과 온도 측정용 써미스터 소자를 위한 신호 케이블을 별도로 구성하여 케이블 사이의 복잡하게 얽히는 것을 방지할 수 있다.Furthermore, when the terminal for voltage measurement and the thermistor element for temperature measurement are formed together when forming one FPCB, the cable for the terminal for voltage measurement and the signal cable for the thermistor element for temperature measurement are separately configured to complicate the cable connection. entanglement can be prevented.
FPCB의 끝단부에 형성되는 복수의 핀을 가진 신호 전 달용 암커넥터(303, 403)는 그 길이 방향을 따라 수직 방향으로 조립되고, 암커넥터(303,403)의 폭 규격은 FPCB 배선 경로를 확보하는 수준 즉, FPCB의 폭보다 다소 큰 수준이 되도록 할 수 있다(참조번호 304, 404 참조). FPCB로는 필요에 따라 단자 및 패턴이 한 면에 한정되는 단면 FPCB 또는 양 면에 함께 설치되는 양면 FPCB를 사용 할 수 있다.The female connectors for signal transmission (303, 403) having a plurality of pins formed at the end of the FPCB are assembled in a vertical direction along the length direction, and the width specification of the female connectors (303,403) is at a level that secures the FPCB wiring path. That is, it can be made to a level somewhat larger than the width of the FPCB (refer to reference numerals 304 and 404). As an FPCB, a single-sided FPCB with terminals and patterns limited to one side or a double-sided FPCB installed together on both sides can be used as needed.
도5 및 도6을 통해 셀전압 및 온도 모니터링 FPCB 장치가 리튬 이온 배터리 모듈 내에서 설치되는 형태를 살펴보면, FPCB(503, 603)의 표면에 구비된 전압 측정용 단자(101)들은 셀의 전극 단자, 즉 셀 터미널(505, 605)들에 밀착되어 연결된다. Looking at the form in which the cell voltage and temperature monitoring FPCB device is installed in the lithium ion battery module through FIGS. 5 and 6 , the voltage measurement terminals 101 provided on the surfaces of the FPCBs 503 and 603 are the electrode terminals of the cell. That is, the cell terminals 505 and 605 are closely connected to each other.
셀의 전극 단자 설치 방식, 모듈을 이루는 셀의 숫자 등을 고려하여 하나의 모듈에 셀전압 및 온도 모니터링 장치를 한쪽 측면에만 설치하거나, 대향하는 양쪽 측면으로 설치할 수 있다.In consideration of the electrode terminal installation method of the cell, the number of cells constituting the module, etc., the cell voltage and temperature monitoring device can be installed on only one side of a module or can be installed on both sides of the module opposite to each other.
모듈의 각 측면에 본 발명의 모니터링 장치를 설치할 때, 두 개 이상의 FPCB 장치를 사용하여 모듈 측면에서 셀 터미널(505, 605)과 조립 시, 동일한 형태를 가지는 FPCB, 가령 A타입 혹은 B타입만 사용하는 경우, 조립 실수로 잘못된 위치로 삽입이 되면 전압 측정오류, 고전압 차이에 의한 R-LEC(Remote Lithium-ion Energy Controler) 손상 및 화재가 발생할 수 있다.When installing the monitoring device of the present invention on each side of the module, when assembling with the cell terminals 505 and 605 from the module side using two or more FPCB devices, use only the FPCB having the same shape, for example, type A or type B In this case, if it is inserted into the wrong position by mistake, voltage measurement error, damage to R-LEC (Remote Lithium-ion Energy Controller) due to high voltage difference, and fire may occur.
따라서, 도3 및 도4에 도시된 바와 같이 셀 어셈블리의 프레임에 있는 스터드 볼트(502, 602)가 조립되는 FPCB의 스터드 홀(102)의 배열을 다르게 형성하여, A타입 FPCB와 B타입 FPCB가 서로 매칭되지 않도록 함으로써, FPCB의 오삽입에 따른 문제을 억제하거나 예방할 수 있다.Therefore, as shown in FIGS. 3 and 4, the arrangement of the stud holes 102 of the FPCB to which the stud bolts 502 and 602 in the frame of the cell assembly are assembled is different, so that the A-type FPCB and the B-type FPCB By not matching with each other, it is possible to suppress or prevent problems caused by erroneous insertion of the FPCB.
또한, 두 개 이상의 FPCB의 사이즈를 달리하여 오삽입을 방지하는 방법도 대체적으로 사용할 있다.In addition, a method of preventing erroneous insertion by varying the sizes of two or more FPCBs can be generally used.
온도 측정을 위한 써미스터 소자(201)와 셀 터미널(505, 605)의 직접적인 접촉상태는 써미스터 소자(201)의 불량과 발화를 유발 할 수 있으므로 소정의 간격을 가지고 있으며, 실리콘 충진재를 도포하여 단락을 방지하고 셀 온도의 확실한 전달을 보장 할 수 있도록 하는 것이 바람직하다. Since the direct contact state between the thermistor element 201 and the cell terminals 505 and 605 for temperature measurement may cause failure and ignition of the thermistor element 201, it has a predetermined interval, and a silicon filler is applied to prevent a short circuit. It is desirable to prevent and ensure reliable transfer of cell temperature.
도 7은 본 발명에 따른 리튬 이온 배터리 모듈 2개가 결합되어 배터리 서브팩을 이루고, 이때 모듈 내의 셀전압 및 온도 모니링 장치가 연결용 커넥터를 통하여 서브팩 상부의 R-LEC(Remote Lithium-ion Energy Controler)에 연결되는 형태를 나타내는 사시도이다.7 shows two lithium-ion battery modules according to the present invention are combined to form a battery sub-pack, and at this time, a cell voltage and temperature monitoring device in the module is connected to the R-LEC (Remote Lithium-ion Energy) (R-LEC) upper part of the sub-pack through a connector for connection. It is a perspective view showing the form connected to the controller).
이를 위해 모듈은 별도 인클로져 혹은 케이스에 수용될 수 있고, 혹은 주변 측면을 보호하는 패널이나 브라케트와 결합될 수 있다. 모듈의 위쪽을 커버하는 상부 커버 위쪽에는 모듈의 암커넥터와 결합될 수 있는 R-LEC가 위치하는 것을 볼 수 있고, 이는 BMS와 연결을 위한 중간 매개부가 될 수 있다. 두 모듈의 R-LEC는 필요한 방식으로 서로 도선으로 연결될 수 있다. To this end, the module can be housed in a separate enclosure or case, or it can be combined with a panel or bracket to protect the surrounding side. It can be seen that the R-LEC that can be combined with the female connector of the module is located above the upper cover that covers the upper part of the module, which can be an intermediate part for connection with the BMS. The R-LECs of the two modules can be wire-connected to each other in any way required.
상부 커버에는 각 모듈의 FPCB 끝단 부분과 암커넥터가 통과할 수 있는 슬릿 혹은 홀이 형성되어 있다. The upper cover has a slit or hole through which the FPCB end of each module and the female connector can pass.
도8은 도7에서 하나의 모듈과 결합된 두 모니터링 장치 및 그 것의 R-LEC와의 결합을 위한 배치 형태가 도시된다. 이런 형태는 도5 및 도6과 같이 하나의 배터리 모듈에서 연결되어 있는 두 FPCB 타입 모니터링 장치가 각각 절곡되어 3차원으로 모듈과 접하게 배치된 후 그 연결부 수직 부분에서 겹치게 배치되고 끝단 부분에서 암커넥터가 복층을 이루도록 배열되고 이 상태로 수커넥터 형태의 접속부를 가지는 R-LEC와 결합되는 예시적 형태를 보여준다. 여기서 복수개의 핀을 가진 신호 전달용 암커넥터는 복열로 조립되며, 각 열의 신호 전달용 암커넥터 사이즈는 FPCB의 배선 경로를 확보하는 수준으로 정해진다. FIG. 8 shows two monitoring devices combined with one module in FIG. 7 and an arrangement form for combining them with R-LEC. In this form, as shown in FIGS. 5 and 6, two FPCB-type monitoring devices connected in one battery module are respectively bent and placed in contact with the module in three dimensions, then overlapped in the vertical part of the connection part, and the female connector is located at the end part It shows an exemplary form that is arranged to form a double layer and combined with an R-LEC having a male connector type connection in this state. Here, the female connector for signal transmission having a plurality of pins is assembled in double rows, and the size of the female connector for signal transmission in each row is determined at a level that secures the wiring path of the FPCB.
이와 같이, 리튬 이온 배터리 모듈의 셀전압 및 온도 모니터링을 위한 회로 구성을 함에 있어서 셀과 커넥터 사이의 인터페이스를 FPCB로 구성함으로써, 기존의 케이블에 비하여 단순하면서도 컴팩트한 연결 구조를 이루게 되어, 내전압 및 내트래킹성을 향상시킬 수 있고, 셀전압 측정의 정확도를 높일 수 있다. 특히, 반복굴곡이 가능하고, 높은 내구성 및 고밀도 배선이 가능하여, 배선 자유도가 우수한 FPCB를 이용함으로써, 기존에 케이블이 뒤엉킨 상태로 복잡하게 설치되어 단선 등의 위험이 존재하던 점을 방지 할 수 있다In this way, in configuring the circuit for monitoring the cell voltage and temperature of the lithium ion battery module, by configuring the interface between the cell and the connector as an FPCB, a simple and compact connection structure is achieved compared to the existing cable, so that the withstand voltage and resistance It is possible to improve the tracking property and increase the accuracy of cell voltage measurement. In particular, it is possible to avoid the risk of disconnection due to complicated installation of cables in a tangled state by using an FPCB with excellent wiring freedom because it can be repeatedly bent, and has high durability and high-density wiring.
한편, 도5 및 도6에서 본 발명의 모니터링 장치에 결합되는 모듈의 구성을 예시적으로 좀 더 살펴보면, On the other hand, looking at the configuration of the module coupled to the monitoring device of the present invention in Figures 5 and 6 by way of example more,
배터리 모듈을 형성함에 있어서 셀은 부피나 무게 대비 용량을 높일 수 있도록 리튬을 이용한 이차전지 셀을 주로 사용하며, 여기서는 파우치 셀의 얇은 실링부 혹은 주변부를 4각틀 형태의 프레임에 결합시켜 셀 어셈블리를 만들어 사용하고 셀 어셈블리는 셀의 넓은 면을 서로 마주보게 겹치도록 설치한다. 한 쌍을 이루는 셀과 셀 사이에는 알루미늄 판 등의 열전도체 히트 싱크를 설치하여 셀 가열이나 냉각에 사용할 수 있도록 한다. In forming the battery module, a secondary battery cell using lithium is mainly used to increase the capacity to volume or weight ratio. The cell assembly is installed with the wide sides of the cell facing each other and overlapping each other. A heat conductor heat sink such as an aluminum plate is installed between the cell and the cell forming a pair so that it can be used for heating or cooling the cell.
복수 프레임을 관통하는 나사 등으로 복수 셀과 열전도체가 가령 좌우 방향으로 겹쳐진 상태로 고정이 되도록 하며, 여기서 사용하는 파우치 셀은 두 전극 단자(셀 터미널: 505, 605)가 서로 반대 측변으로 가령 파우치 셀의 전후 방향으로 설치되어 프레임 사이의 공간으로 노출된다. A plurality of cells and a heat conductor are fixed in a state of overlapping, for example, in the left and right directions with screws passing through a plurality of frames. It is installed in the front and rear direction of the frame and is exposed to the space between the frames.
프레임에는 스터드 볼트(602)가 형성되고, 한 쌍을 이루는 셀의 같은 극성의 전극 단자는 스터드 볼트를 피해 프레임 위로 서로 겹치도록 절곡되어 외부로 노출된다. The stud bolts 602 are formed on the frame, and electrode terminals of the same polarity of the cells forming a pair are bent so as to overlap each other on the frame avoiding the stud bolts and exposed to the outside.
스터드 볼트(602) 위치에 홀이 형성된 제1 알미늄 플레이트가 셀 터미널 혹은 전극 단자 위로 적층되고 그 위로 전압 측정용 전기단자와 온도 측정용 센서인 써미스터가 설치된 FPCB 장치가 적층되고, 다시 그 위로 스터드 볼트 위치에 홀이 형성된 제2 플레이트 혹은 압착탭(606)이 적층된다.A first aluminum plate with a hole formed at the stud bolt 602 position is stacked on the cell terminal or electrode terminal, and an FPCB device in which an electrical terminal for voltage measurement and a thermistor, which is a sensor for temperature measurement, is installed is stacked on top of the stud bolt again A second plate or a compression tab 606 having a hole formed therein is stacked.
스터드 볼트에 너트(607)를 결합시키고 너트를 조여 스터드 볼트를 가진 프레임, 제1 알미늄 플레이트, FPCB, 제2 플레이트를 밀착시킨다.The nut 607 is coupled to the stud bolt and the nut is tightened to bring the frame having the stud bolt, the first aluminum plate, the FPCB, and the second plate into close contact.
이때 전압 측정용 단자는 홀 주변에 형성되어 스터드 볼트(602) 주변에 있는 파우치셀의 한 셀 터미널(전극 단자)과 전기적으로 접속되고, FPCB의 온도 측정용 센서(써미스터 소자:201)는 노출된 셀의 일부 표면과 밀착된다. 즉 서미스터는 제1 알미늄 플레이트에 닿지 않고, 프레임의 제거된 부분을 통해 드러난 셀 표면 일부와 접하게 된다. 단, 셀 표면 일부에는 전기적으로 부도체이고 열전도성은 뛰어난 점착물질층 혹은 점착층 테이프가 도포되어 드러난 셀 표면 일부와 안정적으로 결합되면서 셀 온도를 서미스터가 인식하도록 한다. At this time, the voltage measurement terminal is formed around the hole and is electrically connected to one cell terminal (electrode terminal) of the pouch cell around the stud bolt 602, and the temperature measurement sensor (thermistor element: 201) of the FPCB is exposed. It is in close contact with some surfaces of the cell. That is, the thermistor does not touch the first aluminum plate, but comes into contact with a part of the cell surface exposed through the removed portion of the frame. However, a part of the cell surface is electrically non-conductive and an adhesive material layer or adhesive layer tape with excellent thermal conductivity is applied to stably combine with a part of the exposed cell surface so that the thermistor recognizes the cell temperature.
서미스터는 주로 반도체의 온도에 따른 저항 변화를 이용하는 것이며 온도에 따라 서미스터와 접속된 FPCB 내의 전기 도선에서 변화하는 전기 신호를 전달하므로 온도 변화를 확인할 수 있게 된다.The thermistor mainly uses the resistance change according to the temperature of the semiconductor, and according to the temperature, the electric signal that changes in the electric conductor in the FPCB connected to the thermistor is transmitted, so that the temperature change can be confirmed.
써미스터와 연결된 배선, 즉 전기도선 및 전압 측정용 단자와 연결된 전기도선은 FPCB 일단에 형성된 암형 커넥터와 연결되어 외부로 전기 신호를 인출시킬 수 있다.A wiring connected to the thermistor, that is, an electrical conductor connected to an electrical conductor and a terminal for voltage measurement, is connected to a female connector formed at one end of the FPCB to draw an electrical signal to the outside.
암형 커넥터는 배터리 모듈의 커버 혹은 하우징 외부에 설치된 모듈 회로부 R-LEC를 통해 배터리 팩의 BMS와 연결되고 BMS에 필요한 센싱 정보를 전달하고 BMS의 제어 신호를 받을 수 있다. The female connector is connected to the BMS of the battery pack through the R-LEC of the module circuit installed outside the cover or housing of the battery module, and can transmit sensing information necessary for the BMS and receive a control signal from the BMS.
이상에서는 한정된 실시예를 통해 본 발명을 설명하고 있으나, 이는 본 발명의 이해를 돕기 위해 예시적으로 설명된 것일 뿐 본원 발명은 이들 특정의 실시예에 한정되지 아니한다. In the above, the present invention has been described with reference to limited embodiments, but these are only illustratively described to help the understanding of the present invention, and the present invention is not limited to these specific embodiments.
따라서, 당해 발명이 속하는 분야의 통상의 지식을 가진 자라면 본 발명을 토대로 다양한 변경이나 응용예를 실시할 수 있을 것이며 이러한 변형례나 응용예는 첨부된 특허청구범위에 속함은 당연한 것이다.Accordingly, those of ordinary skill in the art to which the present invention pertains will be able to make various changes or application examples based on the present invention, and it is natural that such modifications or application examples belong to the appended claims.
Claims (4)
- 물리적으로 서로 겹쳐지는 복수의 이차전지 셀과, 상기 이차전지 셀을 고정하는 기구물과, 상기 이차전지 셀을 전기적으로 서로 결합시키고 전력을 인출하기 위한 배선 및 전기 신호를 유통하기 위한 배선을 포함하는 회로부를 구비하여 이루어지는 전기자동차용 배터리 모듈에서 개별 이차전지 셀의 전압 및 온도를 확인하기 위한 배터리 모듈용 모니터링 장치로서,A circuit unit including a plurality of secondary battery cells physically overlapping each other, a mechanism for fixing the secondary battery cells, and a wiring for electrically coupling the secondary battery cells to each other and extracting power and a wiring for distributing an electrical signal A monitoring device for a battery module for checking the voltage and temperature of individual secondary battery cells in a battery module for an electric vehicle comprising:상기 회로부의 일부를 이루면서, 상기 이차전지 셀의 전압을 확인하기 위하여 상기 이차전지 셀의 단자와 연결되는 전압 측정용 단자와, 상기 이차전지 셀과 전기적으로 절연되고 열적으로 전열되도록 상기 이차전지 셀과 밀착되어 셀 온도에 따른 전기신호를 발생시키는 온도센서의 온도 측정용 단자가 함께 구비되는 연성인쇄회로기판(FPCB)을 포함하는 배터리 모듈용 모니터링 장치.A terminal for measuring a voltage that forms a part of the circuit part and is connected to a terminal of the secondary battery cell to check the voltage of the secondary battery cell, and the secondary battery cell to be electrically insulated from the secondary battery cell and to be thermally transferred; A monitoring device for a battery module comprising a flexible printed circuit board (FPCB) provided with a temperature measurement terminal of a temperature sensor that is closely attached and generates an electrical signal according to a cell temperature.
- 제 1 항에 있어서,The method of claim 1,상기 온도센서는 서미스터인 것을 특징으로 하는 배터리 모듈용 모니터링 장치.The temperature sensor is a monitoring device for a battery module, characterized in that the thermistor.
- 물리적으로 서로 겹쳐지는 복수의 이차전지 셀과, 상기 이차전지 셀을 고정하는 기구물과, 상기 이차전지 셀을 전기적으로 서로 결합시키고 전력을 인출하기 위한 배선 및 전기 신호를 유통하기 위한 배선을 포함하는 회로부를 구비하여 이루어지는 전기자동차용 배터리 모듈로서,A circuit unit including a plurality of secondary battery cells physically overlapping each other, a mechanism for fixing the secondary battery cells, and a wiring for electrically coupling the secondary battery cells to each other and extracting power and a wiring for distributing an electrical signal As a battery module for an electric vehicle comprising:상기 회로부의 일부를 이루면서 개별 이차전지 셀 전압을 확인하기 위한 모니터링 장치로서, 상기 이차전지 셀의 전극 단자와 연결되는 전압 측정용 전기단자와, 개별 이차전지 셀과 전기적으로 절연되고 열적으로 전열되도록 상기 이차전지 셀과 밀착되어 셀 온도에 따른 전기신호를 변화시키는 온도센서가 함께 구비되는 연성인쇄회로기판(FPCB)을 포함하여 이루어지는 전기자동차용 배터리 모듈.A monitoring device for checking an individual secondary battery cell voltage while forming a part of the circuit part, wherein an electrical terminal for measuring a voltage connected to an electrode terminal of the secondary battery cell is electrically insulated from the individual secondary battery cell and is thermally heated A battery module for an electric vehicle comprising a flexible printed circuit board (FPCB) provided together with a temperature sensor that is in close contact with a secondary battery cell and changes an electric signal according to the cell temperature.
- 제 3 항에 있어서,4. The method of claim 3,각각의 상기 이차전지 셀은 각형 혹은 파우치형 이차전지로 이루어지며, 주변이 프레임으로 고정된 상태로 대면적면이 열전도체 플레이트를 매개로 겹쳐져 쌍을 이루고, 상기 쌍 복수 개가 대면적면이 서로 겹치도록 배치되고, 상기 프레임을 이용하여 서로 고정된 상태를 이루며,Each of the secondary battery cells is made of a prismatic or pouch-type secondary battery, and a large-area surface is overlapped with a heat conductor plate as a medium while the periphery is fixed with a frame to form a pair, and a plurality of pairs of the large-area surface overlap each other arranged so as to form a fixed state with each other using the frame,적어도 한 쌍마다 상기 이차전지 셀의 전극 단자가 형성된 측면에 대응하는 상기 프레임의 일 측에는 스터드가 설치되고, 상기 한 쌍을 이루는 상기 이차전지 셀의 전극 단자들은 공히 상기 스터드 주변에서 배치되고, 상기 FPCB의 스터드 대응부에는 스터드홀이 설치되고, 상기 전압 측정용 전기 단자는 상기 스터드가 통과하는 상기 스터드홀 주변으로 배치되고,A stud is installed on one side of the frame corresponding to the side on which the electrode terminal of the secondary battery cell is formed for at least one pair, and the electrode terminals of the secondary battery cell constituting the pair are both arranged around the stud, and the FPCB A stud hole is installed in the stud corresponding part of the, and the electrical terminal for measuring the voltage is disposed around the stud hole through which the stud passes,상기 프레임은 상기 온도센서에 대응되는 일 부분이 제거되어 상기 이차전지 셀의 전극 단자가 형성된 측면의 일부를 노출하도록 형성되어, The frame is formed such that a portion corresponding to the temperature sensor is removed to expose a portion of a side surface on which the electrode terminal of the secondary battery cell is formed,상기 FPCB의 스터드홀로 상기 스터드를 통과시키고 상기 스터드를 고정수단으로 결속시킬 때 상기 이차전지 셀의 노출된 측면 일부는 상기 FPCB의 상기 온도센서와 접하고, 상기 FPCB의 상기 전압 측정용 전기 단자는 상기 한 쌍을 이루는 상기 이차전지 셀의 전극 단자들과 겹치면서 전기적으로 접속하도록 이루어지는 것을 특징으로 하는 전기자동차용 배터리 모듈.When passing the stud through the stud hole of the FPCB and binding the stud with a fixing means, a part of the exposed side surface of the secondary battery cell is in contact with the temperature sensor of the FPCB, and the electrical terminal for measuring the voltage of the FPCB is as described above. A battery module for an electric vehicle, characterized in that it overlaps with the electrode terminals of the secondary battery cells forming a pair and is electrically connected to each other.
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